Hello rowleyc,

I am not sure where these tiles are from, but as no one has answered you for over six months I'll give it a go. My best guess is they are a porcelain or ceramic white beveled Arabesque tile. Prices of these are quite varied in the market as it is a relatively new product. Our price is $12.95 a square foot.

Whisper White Beveled Porcelain Arabesque Tile $12.95 a Square Foot.

Beveled Whisper White Beveled Porcelain Arabesque Tile $12.95 a square foot from The Builder Depot part of our Highland Park Collection.